A Method and System for UWB Signal Detection Based on Equidistant Array Multi-Antenna Reception

Abstract

This invention belongs to the field of broadband communication technology and discloses a UWB signal detection method and system based on equidistant array multi-antenna reception. All antennas are arranged in an equidistant array; the signal received by each antenna is cross-correlated with the local sequence; the cross-correlation results of adjacent antennas are merged using conjugate multiplication to obtain one data stream; the calculation results of the merged data from multiple adjacent antennas are accumulated using the same index, and finally merged into one total data stream; the final total data stream is weighted and accumulated according to the sign period, and the absolute value of the accumulated result is processed; the absolute value processing result is used for peak period detection and peak comparison, and the signal detection result is output. This invention eliminates the influence of carrier frequency offset; the weighted accumulation processing according to the sign period further improves the gain, greatly improving the signal detection sensitivity and enhancing the overall system performance.

Description

Technical Field

[0001] This invention belongs to the field of broadband communication technology, and particularly relates to a method and system for detecting UWB signals based on equidistant array multi-antenna reception. Background Technology

[0002] Currently, GNSS-based outdoor positioning technology is relatively mature. However, indoors, satellite signals are easily blocked, making normal positioning services impossible and the positioning accuracy insufficient to meet service requirements. In recent years, the demand for high-precision positioning services has become increasingly strong. Statistics show that 70%-80% of people's activities occur indoors, making the development of indoor positioning technology of great significance. Based on various needs, many corresponding positioning technologies have emerged and achieved good results, such as infrared, radio frequency identification, ultrasound, WIFI, Bluetooth, Zigbee, and visual positioning technologies. However, each has its own limitations, either having low positioning accuracy or being highly dependent on the environment, failing to meet people's requirements for high accuracy and good environmental adaptability in indoor positioning sensing systems. UWB positioning technology has many advantages, enabling high-precision indoor positioning. Compared to other wireless positioning technologies, UWB has many advantages such as strong anti-interference capabilities, extremely wide bandwidth, high transmission rate, and low power consumption.

[0003] However, UWB technology is also a type of wireless communication technology. A key technology in wireless communication is signal detection. The robustness of signal detection methods is crucial for improving communication quality and building robust communication systems. As the first gateway for signal identification, highly reliable signal detection methods can ensure low false detection and low false detection rates in low signal-to-noise ratio environments. The sensitivity of the signal detection method directly affects the ranging range of UWB and its application in complex scenarios. Therefore, low-complexity and high-reliability signal detection methods have always been one of the main research directions in wireless communication technology.

[0004] Based on the above analysis, the problems and defects of the existing technology are: the existing technology has poor signal detection robustness and low signal detection sensitivity. Summary of the Invention

[0005] To overcome the problems existing in related technologies, the present invention discloses a method and system for UWB signal detection based on equidistant array multi-antenna reception, specifically relating to the field of ultra-wideband (UWB) communication technology. The purpose of this invention is to utilize equidistant arrangement of multiple antennas to ensure that the signals received by adjacent antennas have the same phase difference. The phase difference is obtained by conjugate multiplication of the cross-correlation results of adjacent receiving antennas, and the diversity gain is obtained by accumulating the results of the conjugate multiplication of multiple antennas. Furthermore, the accumulated filtering of the gain analysis results significantly improves the sensitivity of signal detection.

[0006] The technical solution is as follows: a UWB signal detection method based on equidistant array multi-antenna reception, including:

[0007] S1, All antennas are arranged in an equidistant array according to the distance of the set wavelength;

[0008] S2, perform cross-correlation calculation on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal;

[0009] S3: The cross-correlation results of two adjacent data lines are merged by conjugate multiplication to obtain one data line;

[0010] S4: The calculation results of the data from multiple adjacent antennas are accumulated with the same index and finally merged into one total data stream.

[0011] S5 performs weighted accumulation on the final total data according to the sign period, and takes the absolute value of the accumulated result.

[0012] S6 uses the absolute value processing result to perform peak period detection and peak comparison, and outputs the signal detection result.

[0013] In step S1, all antennas are arranged in an equidistant array according to a set wavelength distance, including:

[0014] S101, calculate the distance of half a wavelength based on the used radio frequency, as expressed by:

[0015]

[0016] In the formula, d half For a distance of half a wavelength, c light For the speed of light, f RF The radio frequency of the signal;

[0017] S102, according to the calculated half-wavelength distance, all antennas are arranged in a straight line.

[0018] In step S2, a cross-correlation operation is performed on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal, expressed as:

[0019]

[0020] In the formula, C m For the m-th antenna, N represents the result of the cross-correlation operation. smp S is the number of sampling points contained in one symbol period. m (n) represents the signal sampled by the analog-to-digital converter (ADC) corresponding to the m-th antenna, S loc For the local sequence, m is the antenna index, ranging from 1 to Nante, where Nante represents the total number of array antennas; n is the nth sampling point corresponding to the ADC; and τ is a temporary variable based on n.

[0021] In step S3, one data channel is obtained, and its expression is:

[0022] r ms (n)=C ms+1 (n)*conj(C ms (n))

[0023] In the formula, r ms (n) represents the combined result of the cross-correlation calculations for antennas ms and ms+1, C ms+1 (n) represents the cross-correlation result corresponding to the nth sampling point of the (ms+1)th antenna, C ms (n) represents the cross-correlation result corresponding to the nth sampling point of the ms-th antenna, and conj() is the conjugate operation. The value of ms ranges from 1 to Nante-1. For Nante antennas, the result of multiplying Nante-1 sets of conjugates is obtained.

[0024] In step S4, the data is finally merged into one total data stream, expressed as:

[0025]

[0026] In the formula, R(n) represents the total data of the final merged channel.

[0027] In step S5, the absolute value of the accumulated result is taken, and the expression is:

[0028] s iir (n)=(1-ω G )*s iir (nN smp )+ω G *R(n)

[0029] In the formula, s iir(n) represents the weighted sum of the positions of the current symbol and the previous symbol after the update, where ω is the result. G ω is the weighting coefficient. G s is the weighting coefficient. iir (nN smp The result is the weighted sum of the positions of the previous symbol.

[0030] In step S5, the absolute value of the accumulated result is taken, and the expression is:

[0031] s abs (n)=abs(s iir (n))

[0032] In the formula, s abs (n) represents the pair of s iir (n) is the result of the absolute value operation, and abs() is the absolute value operation.

[0033] In step S6, the absolute value processing result is used to perform peak period detection and peak comparison, and the output signal detection result includes:

[0034] S601: Initialize reference peak index position P ref =-10;

[0035] S602: According to s abs (n), extract the index P corresponding to the current symbol peak. idx =argmax(s abs ); where argmax() is the function to extract the index corresponding to the peak value;

[0036] S603: Peak index P of the current symbol idx With reference peak index P ref The absolute value of the difference is compared with the threshold, expressed as: abs(P idx -P ref ) <th idx , among which, th idx For the index difference threshold, th idx =2;

[0037] S604: When abs(P) idx -P ref ) <th idx Then the periodic detection count C peak =C peak +1, and update the reference peak index value P. ref =P idx ;

[0038] S605: If abs(P) is not satisfied idx -Pref ) <th idx Then the periodic detection counter C is cleared. peak =0, and update the reference peak index value P. ref =P idx , where C peak For periodic detection and counting;

[0039] S606: Determine the peak period detection count C peak Does it meet the threshold C? th If the condition is not met, proceed to S602 to continue the evaluation of the next symbol, where C th The threshold for periodic detection counting;

[0040] S607: If C is satisfied peak ≥C th Signal detection successful, signal detection complete.

[0041] Another object of the present invention is to provide a UWB signal detection system based on equidistant array multi-antenna reception, the system implementing the UWB signal detection method based on equidistant array multi-antenna reception, the system comprising:

[0042] Antenna arrangement module, used to arrange all antennas in an equidistant array according to a set wavelength distance;

[0043] The cross-correlation calculation module is used to perform cross-correlation calculations on the signals received by each antenna and the local sequence to obtain the cross-correlation calculation results of the sampled signals;

[0044] The adjacent two-antenna merging module is used to merge the cross-correlation results of adjacent two antennas by conjugate multiplication to obtain one data stream;

[0045] The total data acquisition module is used to accumulate the calculation results of data from multiple adjacent antennas after merging with the same index, and finally merge them into one total data stream.

[0046] The absolute value processing module is used to perform weighted accumulation processing on the final total data of one channel according to the sign period, and to take the absolute value of the accumulated result.

[0047] The peak period detection module is used to perform peak period detection and peak comparison using the absolute value processing results, and outputs the signal detection results.

[0048] Furthermore, the system is mounted on a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it can realize the functions of the UWB signal detection system based on equidistant array multi-antenna reception described above.

[0049] Combining all the above technical solutions, the beneficial effects of this invention are as follows: This invention uses an equidistant array of antennas installed at half-wavelength intervals; performs cross-correlation calculations on the signals received by each antenna and the local sequence; merges the cross-correlation results of adjacent antennas using conjugate multiplication; accumulates the calculation results of multiple adjacent antennas using the same index, ultimately merging them into a single data stream; performs weighted accumulation processing according to the sign period, and takes the absolute value of the accumulated result; performs peak period detection and peak comparison, and outputs the signal detection result. This method has very strong robustness. By utilizing the fact that the phase difference of the signal arriving at adjacent antennas is the same, the cross-correlation calculation results of multiple adjacent antennas are merged to obtain the diversity gain of multiple antennas. Simultaneously, this characteristic eliminates the influence of carrier frequency offset, and the gain is further improved by performing weighted accumulation processing according to the sign period, greatly improving the signal detection sensitivity and enhancing the overall system performance.

[0050] This invention utilizes multiple antennas arranged in an equidistant array to ensure that the signals received by adjacent antennas have the same phase difference, which can be used for angle measurement. The cross-correlation calculation results of multiple adjacent antennas are combined to obtain the diversity gain of the multiple antennas, which improves the sensitivity of signal detection and eliminates the influence of carrier frequency offset. Weighted accumulation processing based on the sign period is used to further improve the gain, which greatly improves the sensitivity of signal detection and enhances the overall performance of the system.

[0051] This invention addresses the increasing prevalence of multi-antenna UWB receivers. By fully utilizing the diversity gain provided by multi-antenna reception, the communication distance between devices can be effectively increased, reducing base station deployment costs. Furthermore, compared to single-antenna devices, the robustness of device communication at the same distance is significantly improved, making it better suited to complex and changing propagation environments. This invention provides an effective signal detection method based on the equidistant array antenna arrangement of UWB devices, effectively improving the domain robustness of signal detection. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure;

[0053] Figure 1 This is a flowchart of the UWB signal detection method based on equidistant array multi-antenna reception provided in the embodiments of the present invention;

[0054] Figure 2 This is a schematic diagram of the antenna distribution for the UWB signal detection method based on equidistant array multi-antenna reception provided in an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of adjacent antenna data merging in the UWB signal detection method based on equidistant array multi-antenna reception provided in an embodiment of the present invention;

[0056] Figure 4 This is a flowchart of the signal period detection data of the UWB signal detection method based on equidistant array multi-antenna reception provided in the embodiments of the present invention;

[0057] Figure 5 This is a schematic diagram of a UWB signal detection system based on equidistant array multi-antenna reception provided in an embodiment of the present invention;

[0058] Figure 6 This is a comparison of the UWB signal detection performance based on equidistant array multi-antenna reception provided in the embodiments of the present invention;

[0059] In the diagram: 1. Antenna arrangement module; 2. Cross-correlation calculation module; 3. Adjacent antenna merging module; 4. Total data acquisition module; 5. Absolute value processing module; 6. Peak period detection module. Detailed Implementation

[0060] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0061] The innovation of this invention lies in:

[0062] 1. By using multiple antennas arranged in an equidistant array, the signals received by adjacent antennas have the same phase difference. This characteristic can be used to measure angles, thereby improving the accuracy of angle measurement.

[0063] 2. The conjugate multiplication of adjacent antennas eliminates the influence of carrier frequency offset. Because the influence of carrier frequency offset is eliminated, the incoherent accumulation of the cross-correlation results of each symbol can be transformed into coherent accumulation, thereby improving the sensitivity of signal detection.

[0064] 3. By merging the cross-correlation calculation results of multiple adjacent antennas, the diversity gain of the multiple antennas was obtained, which improved the sensitivity of signal detection.

[0065] 4. Weighted accumulation processing based on the sign period further improves the gain, greatly enhancing the sensitivity of signal detection and improving the overall performance of the system.

[0066] Current technology is based on single-antenna signal detection, and the performance of signal detection is affected by clock skew due to the difference in clocks between transmitting and receiving devices. Furthermore, when using multiple antennas for reception, the gain from multiple antennas cannot be effectively combined.

[0067] This invention is based on a multi-antenna equidistant design, corresponding to the characteristic that the phase difference between two adjacent antennas is equal. By multiplying the conjugates of two adjacent antennas and combining the results, the goal of maximizing the multi-antenna gain is achieved. This overcomes the influence of the inability to combine signals received by multiple antennas due to phase randomness, and improves the overall performance of signal detection.

[0068] Example 1, as Figure 1 As shown, the UWB signal detection method based on equidistant array multi-antenna reception provided in this embodiment of the invention includes:

[0069] S1, All antennas are arranged in an equidistant array according to the distance of the set wavelength;

[0070] S2, perform cross-correlation calculation on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal;

[0071] S3: The cross-correlation results of two adjacent data lines are merged by conjugate multiplication to obtain one data line;

[0072] S4: The calculation results of the data from multiple adjacent antennas are accumulated with the same index and finally merged into one total data stream.

[0073] S5 performs weighted accumulation on the final total data according to the sign period, and takes the absolute value of the accumulated result.

[0074] S6 uses the absolute value processing result to perform peak period detection and peak comparison, and outputs the signal detection result.

[0075] like Figure 2 As shown, in step S1, all antennas are arranged in an equidistant array according to a set wavelength distance, including:

[0076] S101, calculate the distance of half a wavelength based on the used radio frequency, as expressed by:

[0077]

[0078] In the formula, d half For a distance of half a wavelength, c light For the speed of light, f RF The radio frequency of the signal;

[0079] S102, according to the calculated half-wavelength distance, all antennas are arranged in a straight line.

[0080] In step S2, a cross-correlation operation is performed on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal, expressed as:

[0081]

[0082] In the formula, C m For the m-th antenna, N represents the result of the cross-correlation operation. smp S is the number of sampling points contained in one symbol period. m (n) represents the signal sampled by the analog-to-digital converter (ADC) corresponding to the m-th antenna, S loc For the local sequence, m is the antenna index, ranging from 1 to Nante, where Nante represents the total number of array antennas; n is the nth sampling point corresponding to the ADC; and τ is a temporary variable based on n.

[0083] In step S3, one data channel is obtained, and its expression is:

[0084] r ms (n)=C ms+1 (n)*conj(C ms (n))

[0085] In the formula, r ms (n) represents the combined result of the cross-correlation calculations for antennas ms and ms+1, C ms+1 (n) represents the cross-correlation result corresponding to the nth sampling point of the (ms+1)th antenna, C ms (n) represents the cross-correlation result corresponding to the nth sampling point of the ms-th antenna, and conj() is the conjugate operation. The value of ms ranges from 1 to Nante-1. Therefore, for Nante antennas, we obtain the result after multiplying the conjugates of Nante-1 groups.

[0086] In step S4, the data is finally merged into one total data stream, expressed as:

[0087]

[0088] In the formula, R(n) represents the total data of the final merged channel.

[0089] In step S5, the absolute value of the accumulated result is taken, and the expression is:

[0090] s iir (n)=(1-ω G )*s iir (nN smp )+ω G*R(n)

[0091] In the formula, s iir (n) represents the weighted sum of the positions of the current symbol and the previous symbol after the update, where ω is the result. G ω is the weighting coefficient. G s is the weighting coefficient. iir (nN smp The result is the weighted sum of the positions of the previous symbol.

[0092] In step S5, the absolute value of the accumulated result is taken, and the expression is:

[0093] s abs (n)=abs(s iir (n))

[0094] In the formula, s abs (n) represents the pair of s iir (n) is the result of the absolute value operation, and abs() is the absolute value operation.

[0095] In step S6, the absolute value processing result is used to perform peak period detection and peak comparison, and the output signal detection result includes:

[0096] S601: Initialize reference peak index position P ref =-10;

[0097] S602: According to s abs (n), extract the index P corresponding to the current symbol peak. idx =argmax(s abs ); where argmax() is the function to extract the index corresponding to the peak value;

[0098] S603: Peak index P of the current symbol idx With reference peak index P ref The absolute value of the difference is compared with the threshold, expressed as: abs(P idx -P ref ) <th idx , among which, th idx For the index difference threshold, th idx =2;

[0099] S604: When abs(P) idx -P ref ) <th idx Then the periodic detection count C peak =C peak +1, and update the reference peak index value P. ref =P idx ;

[0100] S605: If abs(P) is not satisfied idx -P ref ) <th idx Then the periodic detection counter C is cleared. peak =0, and update the reference peak index value P. ref =P idx , where C peak For periodic detection and counting;

[0101] S606: Determine the peak period detection count C peak Does it meet the threshold C? th If the condition is not met, proceed to S602 to continue the evaluation of the next symbol, where C th The threshold for periodic detection counting;

[0102] S607: If C is satisfied peak ≥C th Signal detection successful, signal detection complete.

[0103] Example 2, as Figure 5 As shown, the UWB signal detection system based on equidistant array multi-antenna reception provided in this embodiment of the invention includes:

[0104] Antenna arrangement module 1 is used to arrange all antennas in an equidistant array according to a set wavelength distance;

[0105] Cross-correlation module 2 is used to perform cross-correlation calculations on the signals received by each antenna and the local sequence to obtain the cross-correlation calculation results of the sampled signals;

[0106] The adjacent two-antenna merging module 3 is used to merge the cross-correlation calculation results of adjacent two antennas by conjugate multiplication to obtain one data stream;

[0107] The total data acquisition module 4 is used to accumulate the calculation results of the data from multiple adjacent antennas after merging with the same index, and finally merge them into one total data stream.

[0108] The absolute value processing module 5 is used to perform weighted accumulation processing on the final total data of one channel according to the sign period, and to take the absolute value of the accumulated result.

[0109] Peak period detection module 6 is used to perform peak period detection and peak comparison using the absolute value processing result, and output the signal detection result.

[0110] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0111] To further illustrate the effects of the embodiments of the present invention, the following experiment was conducted: Using the local sequence [–1 0 0 00 +1 0 –1 0 +1 +1 +1 0 +1 –1 0 0 0 +1 –1 +1 +1 +1 0 0 – + 0 – 0 0], signal detection performance simulations were performed on single-antenna, dual-antenna, and triple-antenna systems, respectively. The single-antenna system used the traditional method, while the dual-antenna and triple-antenna systems used the method of the present invention. The weighting coefficient ω... G =0.5. The simulation results are as follows: Figure 6 As shown, the dual-antenna performance is about 1 dB higher than the single-antenna performance, while the three-antenna performance is about 2 dB higher than the dual-antenna performance. This indicates that the method of the present invention can utilize the diversity gain of multiple antennas and significantly improve the performance of signal detection.

[0112] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention and within the spirit and principles of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for detecting UWB signals based on equidistant array multi-antenna reception, characterized in that, The method includes: S1, All antennas are arranged in an equidistant array according to the distance of the set wavelength; S2, perform cross-correlation calculation on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal; S3: The cross-correlation results of two adjacent data lines are merged by conjugate multiplication to obtain one data line; S4: The calculation results of the data from multiple adjacent antennas are accumulated with the same index and finally merged into one total data stream. S5 performs weighted accumulation on the final total data according to the sign period, and takes the absolute value of the accumulated result. S6 uses the absolute value processing result to perform peak period detection and peak comparison, and outputs the signal detection result.

2. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 1, characterized in that, In step S1, all antennas are arranged in an equidistant array according to a set wavelength distance, including: S101, calculate the distance of half a wavelength based on the used radio frequency, as expressed by: In the formula, d half For a distance of half a wavelength, c light For the speed of light, f RF The radio frequency of the signal; S102, according to the calculated half-wavelength distance, all antennas are arranged in a straight line.

3. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 1, characterized in that, In step S2, a cross-correlation operation is performed on the signal received by each antenna and the local sequence to obtain the cross-correlation result of the sampled signal, expressed as: In the formula, C m N represents the cross-correlation result corresponding to the m-th antenna. smp S is the number of sampling points contained in one symbol period. m (n) represents the signal sampled by the analog-to-digital converter (ADC) corresponding to the m-th antenna, S loc For the local sequence, m is the antenna index, ranging from 1 to Nante, where Nante represents the total number of array antennas; n is the nth sampling point corresponding to the ADC; and τ is a temporary variable based on n.

4. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 3, characterized in that, In step S3, one data channel is obtained, and its expression is: r ms (n)=C ms+1 (n)*conj(C ms (n)) In the formula, r ms (n) represents the combined result of the cross-correlation calculations for antennas ms and ms+1, C ms+1 (n) represents the cross-correlation result corresponding to the nth sampling point of the (ms+1)th antenna, C ms (n) is the result of the cross-correlation operation corresponding to the nth sampling point of the ms-th antenna, and conj() is the conjugate operation. The value of ms ranges from 1 to Nante-1. For Nante antennas, the result of multiplying Nante-1 sets of conjugates is obtained.

5. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 4, characterized in that, In step S4, the data is finally merged into one total data stream, expressed as: In the formula, R(n) represents the total data of the final merged channel.

6. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 5, characterized in that, In step S5, the absolute value of the accumulated result is taken, and the expression is: s iir (n)=(1-ω) G )*s iir (nN smp )+ω G *R(n) In the formula, s iir (n) represents the weighted sum of the positions of the current symbol and the previous symbol after the update, where ω is the result. G s is the weighting coefficient. iir (nN smp The result is the weighted sum of the positions of the previous symbol.

7. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 6, characterized in that, In step S5, the absolute value of the accumulated result is taken, and the expression is: s abs (n)=abs(s iir (n)) In the formula, s abs (n) represents the pair of s iir (n) is the result of the absolute value operation, and abs() is the absolute value operation.

8. The UWB signal detection method based on equidistant array multi-antenna reception according to claim 7, characterized in that, In step S6, the absolute value processing result is used to perform peak period detection and peak comparison, and the output signal detection result includes: S601: Initialize reference peak index position P ref =-10; S602: According to s abs (n), extract the index P corresponding to the current symbol peak. idx =argmax(s abs ); where argmax() is the function to extract the index corresponding to the peak value; S603: Peak index P of the current symbol idx With reference peak index P ref The absolute value of the difference is compared with the threshold, expressed as: abs(P idx -P ref ) <th idx , among which, th idx For the index difference threshold, th idx =2; S604: When abs(P) idx -P ref ) <th idx Then the periodic detection count C peak =C peak +1, and update the reference peak index value P. ref =P idx ; S605: If abs(P) is not satisfied idx -P ref ) <th idx Then the periodic detection counter C is cleared. peak =0, and update the reference peak index value P. ref =P idx , where C peak For periodic detection and counting; S606: Determine the peak period detection count C peak Does it meet the threshold C? th If the condition is not met, proceed to S602 to continue the evaluation of the next symbol, where C th The threshold for periodic detection counting; S607: If C is satisfied peak ≥C th Signal detection successful, signal detection complete.

9. A UWB signal detection system based on equidistant array multi-antenna reception, characterized in that, The system implements the UWB signal detection method based on equidistant array multi-antenna reception as described in any one of claims 1-8, and the system includes: Antenna arrangement module (1) is used to arrange all antennas in an equidistant array according to the distance of a set wavelength; The cross-correlation operation module (2) is used to perform cross-correlation operation on the signal received by each antenna and the local sequence to obtain the cross-correlation operation result of the sampled signal; The adjacent two antenna merging module (3) is used to merge the cross-correlation calculation results of the adjacent two antennas by conjugate multiplication to obtain one data stream; The total data acquisition module (4) is used to accumulate the data calculation results of multiple adjacent antennas after merging with the same index, and finally merge them into one total data. The absolute value processing module (5) is used to perform weighted accumulation processing on the final total data of one channel according to the sign period, and to take the absolute value of the accumulated result. The peak period detection module (6) is used to perform peak period detection and peak comparison using the absolute value processing result, and output the signal detection result.

10. The UWB signal detection system based on equidistant array multi-antenna reception according to claim 9, characterized in that, The system is mounted on a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it can realize the functions of the UWB signal detection system based on equidistant array multi-antenna reception.

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